WAEC 2021 Biology | Objective

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Question 1 View Details
Which of the following organelles is common to both plant and animal cells?
A. Cellulose cell wall
B. Chlorophyl
Correct C. Cell membrane
D. Large vacuole

Correct Answer: C

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Question 2 View Details
TESTLET - T1
The diagrams are illustrations of different sections of a particular fruit. Study them and answer questions 2 and 3.
The sections in X and Y respectively, are
A. longitudinal and transverse
Correct B. transverse and longitudinal
C. cross and transverse
D. transverse and cross

Correct Answer: B

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Question 3 View Details
The fruit that has the illustrated sections is a
A. hesperidium
B. capsule
Correct C. drupe
D. cypsela

Correct Answer: C

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Question 4 View Details
TESTLET - T1
The diagram is an illustration of a fungus. Study it and answer questions 4 to 6.
The structure labelled I is associated with
A. sexual reproduction
Correct B. asexual reproduction
C. bud formation
D. gamete formation

Correct Answer: B

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Question 5 View Details
The structure labelled II is the
A. spore
B. stolon
C. columella
Correct D. sporangium

Correct Answer: D

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Question 6 View Details
Which of the following statements about the structure labelled II is correct? It
Correct A. secretes digestive enzymes into the substrate
B. absorbs mineral salts from the soil
C. forms the root hairs of the organism
D. develops into stolon

Correct Answer: A

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Question 7 View Details
TESTLET - T1
The diagram below is an illustration of a living organism. Study it and answer questions 7 and 8.
The level of organization of the organism is
A. tissue
Correct B. cell
C. organ
D. system

Correct Answer: B

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Question 8 View Details
The organism belongs to the Phylum
A. Rhizopoda
B. Ciliophora
Correct C. Euglenophyta
D. Rhodophyta

Correct Answer: C

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Question 9 View Details
A plant cell placed in a solution with a higher water potential will
A. expand and then shrink
Correct B. enlarge and become turgid
C. expand and then burst
D. decrease in size and become flaccid

Correct Answer: B

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Question 10 View Details
Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because
A. greater amount of DNA is involved in sexual reproduction
Correct B. gametes of parents have different genetic composition
C. genetic materials come from parents of two different species
D. sexual reproduction is a lengthy process

Correct Answer: B

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Question 11 View Details
Radius and ulna are bones of the
A. pectoral girdle
B. upper arm
C. pelvic girdle
Correct D. lower arm

Correct Answer: D

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Question 12 View Details
The blood vessel which carries blood from the alimentary canal to the liver is the
A. hepatic artery
B. hepatic vein
Correct C. hepatic portal vein
D. mesenteric artery

Correct Answer: C

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Question 13 View Details
TESTLET - T1
The below is an illustration of the longitudinal section of a mainmalian organ. Study it and answer questions 13 and 14.
Which of the labelled parts is the cortex?
A. I
B. II
C. III
Correct D. IV

Correct Answer: D

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Question 14 View Details
What is the main function of the organ?
Correct A. Excretion
B. Respiration
C. Reproduction
D. Locomotion

Correct Answer: A

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Question 15 View Details
Detoxification of urea takes place in the
A. pancreas
B. heart
Correct C. liver
D. testes

Correct Answer: C

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Question 16 View Details
Which of the following hormone is suddenly secreted into the blood stream of a frightened person?
A. Insulin
Correct B. Adrenaline
C. Thyroxine
D. Parathormone

Correct Answer: B

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Question 17 View Details
The temperature control centre in mammals is located in the
A. skin
Correct B. hypothalamus
C. pituitary gland
D. adrenal gland

Correct Answer: B

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Question 18 View Details
TESTLET - T1
The diagram is an illustration of a type of eye defect in humans. Study and answer questions 18 and 19.
The eye defect illustrated in the diagram is
A. hypermetropia
B. astigmatism
C. presbyopia
Correct D. myopia

Correct Answer: D

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Question 19 View Details
The eye defect can be corrected by the use of
A. convex lens
Correct B. concave lens
C. bifocal lens
D. cylindrical lens

Correct Answer: B

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Question 20 View Details
How many gametes are produced in the pollen grain of a flowering plant before fertilization?
A. One
Correct B. Two
C. Three
D. Four

Correct Answer: B

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Question 21 View Details
Which of the following organisms does not undergo incomplete metamorphosis?
A. Locust
B. Grasshopper
Correct C. Butterfly
D. Cockroach

Correct Answer: C

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Question 22 View Details
An enzyme reaction may begin to decline when
A. the optimum temperature is attained.
Correct B. the pH of the medium is altered.
C. there is an increase in substrate concentration.
D. the atmospheric pressure is altered.

Correct Answer: B

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Question 23 View Details
INSTRUCTION - D1
The diagram is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died.
What precaution should have been taken to prevent the solution from turning green?
A. Use a non-green plant for the experiment
B. Aerate the solution daily
Correct C. Cover the culture vessel with opaque paper
D. Keep cotton wool around the seedling to make it dry

Correct Answer: C

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Question 24 View Details
INSTRUCTION - D1
The diagram is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died.
The death of the plant was likely caused by
A. excess supply of nutrients to the plant.
B. inadequate supply of water to the plant.
Correct C. algal growth in the solution that used up the nutrients.
D. inability of the plant to make food due to lack of sunlight.

Correct Answer: C

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Question 25 View Details
Which of the following factors is not necessary for photosynthesis?
A. Water
B. Carbon (IV) oxide
Correct C. Wind
D. Sunlight

Correct Answer: C

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